foestauf,
will you help clear up two things...
#1
is this a vaulted area and the hallway being the top floor? I dont see why a smoke detector couldnt/wouldnt be able to serve as dual purpose smoke in such a design.
as far as the 3' from the air supply...
what is the min. distance required?
if that is it, then he doesn't need to predict the air flow because its already been taken into consideration by the experts therefore that distance has been established.
#2
doesnt the locations of the smoke fall under the building inspectors jurisdiction?
or even the fire marshalls?
anyway thats how we do it here in my little neck of the woods in the pacific northwest.
h20
